使用 Windows Forms 自带的 System.Windows.Forms.Screen 类可以从一个窗口句柄获取到对应的屏幕。随后可以使用此 Screen 类获取各种屏幕信息。
System.Windows.Forms.Screen
通过句柄获取屏幕类：
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System.Windows.Forms.Screen.FromHandle(hWnd)
这里我做了一个 DEMO 程序，画出了窗口的位置和大小，以及当前窗口所在的屏幕的位置和大小。
附代码
MainWindow.xaml
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<Window x:Class="Walterlv.Issues.Dpi.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Walterlv.Issues.Dpi"
mc:Ignorable="d"
Title="欢迎阅读吕毅的博客 blog.walterlv.com" Height="450" Width="800">
<Grid x:Name="RootPanel">
<Canvas SnapsToDevicePixels="True">
<UIElement.RenderTransform>
<ScaleTransform ScaleX="0.2" ScaleY="0.2" />
</UIElement.RenderTransform>
<Border x:Name="ScreenBorder" Background="#E4E4E6">
<UIElement.RenderTransform>
<TranslateTransform x:Name="ScreenTranslateTransform" />
</UIElement.RenderTransform>
<TextBlock x:Name="ScreenTextBlock" FontSize="240" TextAlignment="Right" />
</Border>
<Border x:Name="WindowBorder" Background="#949499">
<UIElement.RenderTransform>
<TranslateTransform x:Name="WindowTranslateTransform" />
</UIElement.RenderTransform>
<TextBlock x:Name="WindowTextBlock" FontSize="240" Margin="0 0 -1000 -1000" />
</Border>
</Canvas>
</Grid>
</Window>
MainWindow.xaml.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Interop;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
namespace Walterlv.Issues.Dpi
{
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
LocationChanged += MainWindow_LocationChanged;
SizeChanged += MainWindow_SizeChanged;
}
private void MainWindow_LocationChanged(object sender, EventArgs e)
{
UpdateScreenInfo(this);
}
private void MainWindow_SizeChanged(object sender, SizeChangedEventArgs e)
{
UpdateScreenInfo(this);
}
private void UpdateScreenInfo(Window window)
{
var hwndSource = (HwndSource)PresentationSource.FromVisual(window);
if (hwndSource is null)
{
return;
}
var hWnd = hwndSource.Handle;
var screen = System.Windows.Forms.Screen.FromHandle(hWnd).Bounds;
if (User32.GetWindowRect(hWnd, out var rect))
{
ScreenTranslateTransform.X = screen.X;
ScreenTranslateTransform.Y = screen.Y;
ScreenBorder.Width = screen.Width;
ScreenBorder.Height = screen.Height;
ScreenTextBlock.Text = $@"{rect.left},{rect.top}
{screen.Width}×{screen.Height}";
WindowTranslateTransform.X = rect.left;
WindowTranslateTransform.Y = rect.top;
WindowBorder.Width = rect.right - rect.left;
WindowBorder.Height = rect.bottom - rect.top;
WindowTextBlock.Text = $@"{rect.left},{rect.top}
{rect.right - rect.left}×{rect.bottom - rect.top}";
}
}
}
}
本文会经常更新，请阅读原文： https://blog.walterlv.com/post/detect-screen-that-contains-the-wpf-window.html ，以避免陈旧错误知识的误导，同时有更好的阅读体验。
本作品采用 知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议 进行许可。欢迎转载、使用、重新发布，但务必保留文章署名 吕毅 （包含链接： https://blog.walterlv.com ），不得用于商业目的，基于本文修改后的作品务必以相同的许可发布。如有任何疑问，请 与我联系 ([email protected]) 。